Governor valve



a rflzitw.

A. K. HINCHMAN.

common V ALVE." APPLICATIONIILED SEPT-1B. 1920*,

1 306,012, Patented Feb. 7, 1922.

UNITED STATES PATENT OFFiCE.

ALVA. K. HHQ'GHMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- FOURTH TO CHARLES H. MORTON AND ONE-FOURTH TO CHARLES H. QUIMBY, BOTH 0F PHILADELTHIA, PENNSYLVANIA.

GOVERNOR VALVE.

Specification of Letters Patent.

Patented Feb. 7, 1922.

To all whom it may concern:

Be it known that I, Anva K. HmoHMaN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvama, have invented new and useful Improvements in Governor Valves, of which the following is a specifi cation.

This invention relates to new and useful 1m rovements in governor valves particularly adapted for fluid engines of the character employing high and low pressure chambers and has for its primary object the provision of a valve constructed to establish communication between such chambers for regulating and controlling a fluid pressure from the point of intake to the place of use as to the pressure desired for operating a driven member and for predator-mining said pressure.

Another object of this invention is the provision of a governor valve which shall be simple durab e and efiicient, and which may be manufactured and sold at a comparatively low cost.

With these and other objects in viewas will become more apparent as the descr1p tion proceeds, the invention consists in certain novel features of construction, combination and arrangement of arts as will be hereinafter more fully escribed and claimed.

For a complete understanding of m invention, reference is to be had to the 0 lowing description and accompanying drawings, in which:

Figure 1 is a vertical sectional view, illustrating a governor valve for fluid engines constructed in accordance with my invention, and

Figure 2 is a horizontal sectional view taken substantially on the line 2-2 m Fi ure 1.

I ieferring in detail to the drawings, the numeral 1 indicates a casing having ormed in a portion thereof, a low pressure chamber 2 of a considerably large diameter and in which is reciprocally mounted a piston 3. The chamber 2 is closed by a removable cover plate 4, secured to the casing by fasteners 5. The cover plate 4 is provided with an outlet port 6 for connection with an engine (not shown) or any other memher to be operated by a fluid pressure. The

cover plate 4 carries regulating or adjusting screws 7 adapted to vary or regulate the stroke of the piston 3.

The other portion of the casing 1 has formed therein a high pressure chamber 8 of a diameter smaller than the diameter of the low pressure chamber 2. A comparatively long piston 9 is reciprocally mounted in the high pressure chamber 8 and is socured to a hollow stem 10 that enters the low pressure chamber 2 and extends through the piston 3 and is detachably secured thereto. The stem 10 has a longitudinal passage 11 opening outwardly through one end of said stem into the low pressure chamber 2 while its other end communicates with openin 12 located within the high pressure chamber 8. The high pressure chamber 8 is closed by a cover plate 13 secured to the casing by fasteners 14 and is provided with an intake port 15 adapted to be connected to any fiuid source of a relatively high res sure. The intake port 15 has formed t ersin a valve seat 16 adapted to be engaged by a valve 17 forming an integral part of the piston 9. The piston 9 is provided with bypasses 18 of substantially L-shape having certain of their walls disposed longitudinally and to provide communication with the openings 12 while other walls are disposed vertically or in the direction of the cover plate 13 and laterally of the valve 17 and the seat 16.

In operation, the pressure of the fluid against the valve 17 unseats'the same moving the pistons 9 and 3 upwardly in their respective chambers. When the valve 17 is unseated, the fluid passes throu h the bypasses 18 into the passage 11 of t e stem 10 and thence into the low pressure chamber 2. When the pressure reaches a predctermined amount within the low pressure chamber 2 and owing to the increased ratio of the piston 3 over the piston 9, the pistons will be forced downwardly, moving the valve 17 into engagement with the seat 16 to cut oil the flow of fluid, and thus it will be seen that the low pressure chamber 2 is capable of delivering to an engine or the like fluid at a predetermined pressure,

The by-pass pipe 19 is connected at one of its ends to the intake port 15 and its other end has communication with the low pressure chamber 2 providing a construction into said auxiliar which will permit the fluid to pass directly from the intake port 15 into the low pres sure chan'iber when it is desired to run the engine on the same pressure received from the pressure source. The by-pass pipe 19 is provided with valves 20, 21 and 22. The valve 20 is the main control valve which can be. opened. fully or artially open-ed to control the amount of fiiiid through the by-pass pipe 19 and the latter is conveniently provided with a drain valve 23 at its lower end. A pipe 24 has connection with the by-pass pipe 19 between the valves 22 and 21 and has communication with an auxiliary chamber 25 formed by one face of the piston 3 and a wall 26 of the casing, the same being provided with a suitable valve 27. lVhen it is desired to increase the pressure within the low pressure chamber, the valve 22 is closed and the valves 20, 21 and 27 are opened, permitting'fluid to pass from the intake port 15 chamber 25 exerting a pressure a ainst t e piston 3 in an upward direction t us requiring a great amount of pressure in the low pressure chamber 2 to force said pistons 3 and 9 downwardly to seat the valve 17.

A pipe 28 is connected with the hi h pres sure chamber 8 and to the bypass pipe 19 between the valves 21 and 20 and is provided withavalve 29 and when it is desired to decrease the pressure within the low pressure chamber, the valve 21 is closed and the valves 29 and 20 are opened permitting fluid to pass directly into the high pressure chambar in a desired amount so that the pressure created Within the upper portion of the high pressure chamber will co-operate with thepressure in the low pressure chamber and force the pistons downwardly to seat the valve 17.

Vthile I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and scope of the invention as claimed.

Having thus described my invention, what I claim is 1. A governor valve comprising a casing having high and low pressure chambers provided with intake and outlet ports respectively, pistons in said chambers, a hollow stem connecting said pistons, a valve formed on one of said pistons and adapted to close the intake port, said last named piston having L-shaped by-passes communicating with the hollow stem and opening outwardly through the piston on opposite sides of the valve and intake port.

2. A governor valve comprising a casing having high and low pressure chambers, removable covers for said chambers and having intake and outlet ports for said chambers, pistons in said chambers, a hollow stem connecting said pistons, a valve seat formed in the intake port, a valve formed on one of said pistons, said last named piston having L-shaped by-passes communicating with the stem and opening outwardly of the piston on opposite sides of the valve and valve seat.

3. governor valve comprising a casing havin high and low pressure chambers provi ed with intake and outlet ports respectively,a valve seat formed in the intake port, pistons in said chambers, a hollow stem connecting said pistons and establishing a communication between said chambers, a valve formed on one of said pistons, said last named piston having L-shaped by-passes communicating with the stem and opening outwardly of said pistons on opposite sides of the valve and valve seat, said chambers having ports, a by-pass pipe connected to said ports, regulating valves in said by-pass pipe, said inlet port having the by-pass pi e connectedthereto to permit fluid to pass directly into the high or low pressure chambers from the inlet port.

In testimony whereof I afiix my si nature.

ALVA K. HINCH AN. 

